Yamaha 5KM2-AE1 Service Manual page 406

7.If the coolant temperature indicator light does not come on when the main switch to "ON", or if the
coolant temperature indicator light does not come on when the temperature is high (more than
107 ~ 113 °C (224.6 ~ 235.4 °F)):
1.Coolant temperature indicator light LED
Check the LED of the coolant indicator
G
light.
2.Thermo switch 1
Remove the thermo switch 1 from the cyl-
G
inder head.
Connect the pocket tester (Ω × 1) to the
G
thermo switch 1.
Immerse the thermo switch 1 in coolant 2.
G
Check the thermo switch 1 for continuity.
G
While heating the coolant use a thermome-
ter 3 to record the temperatures.
Water temperature
Test
step
Thermo switch 1
0 ~ 103 °C
1
(32 ~ 217.4 °F)
More than
2 110 ± 3 °C
(230 ± 5.4 °F)
110 ~ 103 °C
3*
(230 ~ 217.4 °F)
Less than 103 °C
4*
(217.4 °F)
Tests 1 & 2; Heat-up tests
Tests 3* & 4*; Cool-down tests
: Continuity
WARNING
Handle the thermo switch 1 with special
care.
Never subject it to a strong shock or
allow it to be dropped. Should it be
dropped, it must be replaced.
Thermo switch 1:
8 Nm (0.8 m • kg, 5.8 ft • lb)
Three bond sealock
CONTINUITY
Good
condition
×
×
×
: No continuity
®
#10
GOOD
CONDITION
*
SIGNAL SYSTEM
NO CONTINUITY
Replace the meter assembly.
BAD CONDITION
Replace the thermo switch 1.
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